I) order. 
1. Check the complete component number. 
two。. Place orders only with suppliers on the list of qualified suppliers: any qualified supplier must pass: 
3. Supplier risk rating (size, location, order taking ability). 
4. Supplier cooperation history rating (past delivery performance). 

II) receiving and inspection. 
External visual inspection. 
1. Packing inspection (outer case label, product label, date code, quantity). 
two。. Appearance inspection (appearance integrity, degree of oxidation, foot loss or retreatment). 
3. Series of supplier shipping documents (COC, inspection report, lead-free specification). 
4. Ensure the original factory. 

III) warehousing logistics. 
Warehousing logistics. 
1. Follow the inventory control of "first-in, first-out" 2. State-of-the-art warehouse hardware. 
(anti-static, dust-free, temperature and humidity control). 
3. Abide by the ISO9001 management requirements. 
Packing. 
1. Vacuum packaging 2. "Electrostatic discharge" protection against transportation of high temperature and high humidity. 
1. Designate long-term carrier partners 2. Traceability of the transportation process. 

IV) after-sales service. 
after-sale service. 
1. Confirm that "customer has received goods" 
two。. Confirm that "has passed the customer quality inspection" 
3. "customer return visit" after use. 
4. Promise "refund and replacement of quality problems within 30 days"
5. Joint technical support of third-party electronic components testing center. 

V) quality commitment. 
We promise that the goods provided are all original and original, and Youlian requires the quality of all components. 
The control process is carried out in strict accordance with ISO9001 standards to ensure zero defect quality management. 

VI) Laboratory testing. 
In order to ensure the zero defect quality of components, a number of national certified electronic components laboratories have become strategic partners of YouLianxin. Through its own laboratory advanced components testing equipment (many of the equipment are IC original production testing equipment), professional technical testing personnel, fully ensure that Youlian core feed inspection and quality control in strict accordance with ISO9001 standards, 100% original confirmation, this is the general distributor does not have the testing method. 
Reliability Test Report COC certificate. 

Integrated circuit testing, screening: 
Design verification. 
Function test, parameter test. 
Quality consistency inspection. 
Aging and screening test. 
Life test. 

VII) testing and equipment. 
ESD rating, Latch-up test evaluation. 
Bare chip testing, aging, screening and evaluation. 
Identification of IC fakes: 
Identification of IC fakes in resale market. 
The quality management system of incoming materials in the manufacturing factory is perfect: universal oscillometer, logic analyzer, analog oscilloscope, channel analyzer, signal generator. 
Guide the factory to improve the quality management system of incoming materials. 
Train quality inspectors to master the theory and method of integrated circuit testing